kungfu math p3 slide15 (lines)pdf
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TRANSCRIPT
![Page 1: Kungfu math p3 slide15 (lines)pdf](https://reader034.vdocument.in/reader034/viewer/2022050804/5480c87ab37959932b8b5d0f/html5/thumbnails/1.jpg)
• identifying and naming perpendicular and parallel lines
What will we learn today?
Geometry Perpendicular and Parallel Lines
![Page 2: Kungfu math p3 slide15 (lines)pdf](https://reader034.vdocument.in/reader034/viewer/2022050804/5480c87ab37959932b8b5d0f/html5/thumbnails/2.jpg)
We are going to learn about lines today!
![Page 3: Kungfu math p3 slide15 (lines)pdf](https://reader034.vdocument.in/reader034/viewer/2022050804/5480c87ab37959932b8b5d0f/html5/thumbnails/3.jpg)
Lines are everywhere.
On roads
On shopping items
![Page 4: Kungfu math p3 slide15 (lines)pdf](https://reader034.vdocument.in/reader034/viewer/2022050804/5480c87ab37959932b8b5d0f/html5/thumbnails/4.jpg)
Perpendicular Lines
Definition:
Lines that are at right angles (90°) to each other.
![Page 5: Kungfu math p3 slide15 (lines)pdf](https://reader034.vdocument.in/reader034/viewer/2022050804/5480c87ab37959932b8b5d0f/html5/thumbnails/5.jpg)
Perpendicular
It means at right angles (90°) to.
How do we label perpendicular lines?
We can draw a little box in the corner.
The little box drawn in the corner, means "at right angles"
![Page 6: Kungfu math p3 slide15 (lines)pdf](https://reader034.vdocument.in/reader034/viewer/2022050804/5480c87ab37959932b8b5d0f/html5/thumbnails/6.jpg)
Try this out!
Can you see any right angle(s) in the figure?
![Page 7: Kungfu math p3 slide15 (lines)pdf](https://reader034.vdocument.in/reader034/viewer/2022050804/5480c87ab37959932b8b5d0f/html5/thumbnails/7.jpg)
Try this out!
Can you see any right angle(s) in the figure?
![Page 8: Kungfu math p3 slide15 (lines)pdf](https://reader034.vdocument.in/reader034/viewer/2022050804/5480c87ab37959932b8b5d0f/html5/thumbnails/8.jpg)
Try this out!
Can you see any right angle(s) in the figure?
![Page 9: Kungfu math p3 slide15 (lines)pdf](https://reader034.vdocument.in/reader034/viewer/2022050804/5480c87ab37959932b8b5d0f/html5/thumbnails/9.jpg)
Try this out!
Can you see any right angle(s) in the figure?
![Page 10: Kungfu math p3 slide15 (lines)pdf](https://reader034.vdocument.in/reader034/viewer/2022050804/5480c87ab37959932b8b5d0f/html5/thumbnails/10.jpg)
Try this out!
Can you see any right angle(s) in the figure?
![Page 11: Kungfu math p3 slide15 (lines)pdf](https://reader034.vdocument.in/reader034/viewer/2022050804/5480c87ab37959932b8b5d0f/html5/thumbnails/11.jpg)
Try this out!
Can you see any right angle(s) in the figure?
There are 4 right angles in a square.
![Page 12: Kungfu math p3 slide15 (lines)pdf](https://reader034.vdocument.in/reader034/viewer/2022050804/5480c87ab37959932b8b5d0f/html5/thumbnails/12.jpg)
Applying the concept learnt
Since there are 4 right angles in a square,
we can find perpendicular lines.
Let’s label the square for easy reference.
Remember to label in sequence.
A B
C D
![Page 13: Kungfu math p3 slide15 (lines)pdf](https://reader034.vdocument.in/reader034/viewer/2022050804/5480c87ab37959932b8b5d0f/html5/thumbnails/13.jpg)
Applying the concept learnt
Line AB is perpendicular to Line BC.
A B
C
![Page 14: Kungfu math p3 slide15 (lines)pdf](https://reader034.vdocument.in/reader034/viewer/2022050804/5480c87ab37959932b8b5d0f/html5/thumbnails/14.jpg)
Try this out!
Can you find any other pair(s) of perpendicular lines in the figure?
![Page 15: Kungfu math p3 slide15 (lines)pdf](https://reader034.vdocument.in/reader034/viewer/2022050804/5480c87ab37959932b8b5d0f/html5/thumbnails/15.jpg)
Try this out!
Line BC is perpendicular to Line DC.
A B
C D
![Page 16: Kungfu math p3 slide15 (lines)pdf](https://reader034.vdocument.in/reader034/viewer/2022050804/5480c87ab37959932b8b5d0f/html5/thumbnails/16.jpg)
Try this out by yourself!
In total, there are 4 pairs of perpendicular lines.
A B
C D
![Page 17: Kungfu math p3 slide15 (lines)pdf](https://reader034.vdocument.in/reader034/viewer/2022050804/5480c87ab37959932b8b5d0f/html5/thumbnails/17.jpg)
Summary
Perpendicular Lines:
Lines that are at right angles (90°) to each other.
![Page 18: Kungfu math p3 slide15 (lines)pdf](https://reader034.vdocument.in/reader034/viewer/2022050804/5480c87ab37959932b8b5d0f/html5/thumbnails/18.jpg)
Parallel Lines
Definition:
• Lines are parallel if they are always the same distance apart and will never meet.
• They also point in the same direction.
In conclusion, parallel lines are Always the same distance apart and never touching.
![Page 19: Kungfu math p3 slide15 (lines)pdf](https://reader034.vdocument.in/reader034/viewer/2022050804/5480c87ab37959932b8b5d0f/html5/thumbnails/19.jpg)
Try this out!
![Page 20: Kungfu math p3 slide15 (lines)pdf](https://reader034.vdocument.in/reader034/viewer/2022050804/5480c87ab37959932b8b5d0f/html5/thumbnails/20.jpg)
Try this out!
A
B
C
D
E
F
Name the parallel lines.
![Page 21: Kungfu math p3 slide15 (lines)pdf](https://reader034.vdocument.in/reader034/viewer/2022050804/5480c87ab37959932b8b5d0f/html5/thumbnails/21.jpg)
Try this out!
A
B
C
D
E
F
Line AB is parallel to Line CD.
![Page 22: Kungfu math p3 slide15 (lines)pdf](https://reader034.vdocument.in/reader034/viewer/2022050804/5480c87ab37959932b8b5d0f/html5/thumbnails/22.jpg)
Try this out!
A
B
C
D
E
F
Line AB // Line CD.
We can use // to represent ‘is parallel to’.
![Page 23: Kungfu math p3 slide15 (lines)pdf](https://reader034.vdocument.in/reader034/viewer/2022050804/5480c87ab37959932b8b5d0f/html5/thumbnails/23.jpg)
Do you know?
A
B
C
D
E
F
Line EF is not parallel to any of the lines.
![Page 24: Kungfu math p3 slide15 (lines)pdf](https://reader034.vdocument.in/reader034/viewer/2022050804/5480c87ab37959932b8b5d0f/html5/thumbnails/24.jpg)
Explanation
A
B
E
F
Line EF is not parallel to any of the lines.
1. Always the same
distance apart 2. Never touching.
Parallel Lines
![Page 25: Kungfu math p3 slide15 (lines)pdf](https://reader034.vdocument.in/reader034/viewer/2022050804/5480c87ab37959932b8b5d0f/html5/thumbnails/25.jpg)
Explanation
C
D
E
F
Line EF is not parallel to any of the lines.
1. Always the same
distance apart 2. Never touching.
Parallel Lines
![Page 26: Kungfu math p3 slide15 (lines)pdf](https://reader034.vdocument.in/reader034/viewer/2022050804/5480c87ab37959932b8b5d0f/html5/thumbnails/26.jpg)
Try this out!
Can you see any parallel line(s) in the figure?
![Page 27: Kungfu math p3 slide15 (lines)pdf](https://reader034.vdocument.in/reader034/viewer/2022050804/5480c87ab37959932b8b5d0f/html5/thumbnails/27.jpg)
Try this out!
Can you see any parallel line(s) in the figure?
Let’s label the square for easy reference. Remember to label in sequence.
A B
C D
![Page 28: Kungfu math p3 slide15 (lines)pdf](https://reader034.vdocument.in/reader034/viewer/2022050804/5480c87ab37959932b8b5d0f/html5/thumbnails/28.jpg)
Try this out!
Can you see any parallel line(s) in the figure?
Line AB // Line DC
A B
C D
![Page 29: Kungfu math p3 slide15 (lines)pdf](https://reader034.vdocument.in/reader034/viewer/2022050804/5480c87ab37959932b8b5d0f/html5/thumbnails/29.jpg)
Try this out!
Can you see any parallel line(s) in the figure?
Line AD // Line BC
A B
C D
![Page 30: Kungfu math p3 slide15 (lines)pdf](https://reader034.vdocument.in/reader034/viewer/2022050804/5480c87ab37959932b8b5d0f/html5/thumbnails/30.jpg)
Try this out!
Can you see any parallel line(s) in the figure?
There are 2 pairs of parallel lines.
A B
C D
![Page 31: Kungfu math p3 slide15 (lines)pdf](https://reader034.vdocument.in/reader034/viewer/2022050804/5480c87ab37959932b8b5d0f/html5/thumbnails/31.jpg)
Are you ready to try out the questions?
![Page 32: Kungfu math p3 slide15 (lines)pdf](https://reader034.vdocument.in/reader034/viewer/2022050804/5480c87ab37959932b8b5d0f/html5/thumbnails/32.jpg)
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